The two general pest problems associated with indoor plants are:

• A. Soil and leaf/stem pests
• B. Root and foliage pests
• C. Pest problems are only soil pests
• D. Insect and mite pests

Answer: (A)

Pest problems on indoor plants generally fall into two zones: what’s happening in the soil around the roots and what’s happening on the leaves and stems. In the potting mix, soil-dwelling pests attack roots and feed from the base of the plant, with common examples like fungus gnats larvae or root-feeding pests. Above the soil, pests attack the plant’s foliage and stems, including insects and mites that feed on leaves or stems. This two-area view is why soil and leaf/stem pests is the best description—it covers the main places pests show up and guides you toward appropriate treatments for each zone. The other options miss this broad-location perspective or mix concepts (like simply naming pest types rather than where they occur) or claim pests are only in the soil, which isn’t true for many indoor-plant problems.